Rio Stage 4-7

On your first shot in level 4-7, aim for the side of the second stone roof. Doing so will cause the stones to fall to the right, also taking out the third segment of the structure, as long as one of the wooden planks circled in white breaks.

Use the same strategy for your second shot, as you did for your first. This time, however, aim for the stone rooftop that's on the first segment of the structure. You should have a similar result—the stones should cause a ton of damage. If you can destroy most of the structure and all of the monkeys in two shots, you should have enough points for a 3 star score.